Reamer



Sept. 20, 1932.l VAN l.1. KUBIN if@ Z 5M Patented Sept. 20, V1932PATENT] OFFICE .V

` VAN J. KUBIN, vor BREA, CALIFORNIA, ASSIGNOR To oninsnn Orr. TOOL oo.,LIMITED, ;A

OFfFULLERTON, CALIFORNIA, A CORPORATlON F NEVADA f BEAMER Application'mea August' 2 5, 1930. y 'serial No. 477,627.

This invention relates to a vWell ,drilling tool and relatesmore'particularly to ay Well reamer. Itis a general object of theinvention to'provide asimple, practical, and eeotivereamerfconstruction. f

It is an obj ect of this'invention to provide a reamer that embodiesa'plurality or series of rotatable annular cutters surroundingl a .bodyor shank and mountedv to rotate in planes tilted relative to the axis ofthe shank.

. lt is another object of the invention to pro` vide an improvedmounting or bearing assembly 'for rotatably mounting a pluralityofspaced annular-cutters on a shank so that they are rotatable in planesinclined relative to the axis of the shank. y

Another object of the'inventionV is to provide a reamerin Which theparts are simple and inexpensive of manufacture.

It is a further objectof the invention to provide a Well reamer of thecharacter mentioned in which the cutters and the bearings or spacers forrotatably supporting the out ters are readily detached orrelnoved fromthe shank for repair Orreplacement.

Gther objects and features of the Vinvention Will be best and morefullyunderstood from thefollowingfdetailed description of 'a typical form andapplication of the invention, throughout Which description referenceWill be had to the accompanying drawing, invvhich:

Fig. 1 is a longitudinal detailed sectional view of the reamer providedbythe present invention. Fig. 2 is a longitudinal detailed sectionalView taken as indicated by line 2-2 on Fig. 1.` Fig. l3 isa sideelevation of Ione of the spacers for rotatably supporting the cutters.Fig. t is aV transverse. detailedsecf tionalvieW taken as indicated byline ,tf1 on Fig. 1. Fig 5 is a side elevation of a por.- tion of thereamer, and Fig. l6 is va, top or plan View of a spacer. i y Thereamerprovided by the present yinvention includes, generally,a shank orbody 10, a plurality of'annular cutters 11, and'ymean's 12 for rotatablymounting the cutters 11l on the body 10 so that they are rotatable'inplanes tilted or angularly disposed relative to the longitudinal axisofthe body'lO.

The body 10 is provided to carry the cutters u v11 andis adapted to beinserted in -an oper-y ating string. The body 10I isel'ongatedand 1sprovided at its ends with means for connection or attachment to partsvof 'an operating string.' lIn the particular form of the inventionillustrated in the drawing, altapered screw-threaded pin 13 is providedaft one end of thebody and agscreW-threaded .socket Mis provided atthe'. opposite end ofv the bod-y. .f A' radial annular vshoulder 1 5 isprovided on the body 10 a short distance from one of its ends. `Thebody' 10is preferably lof-round :cross sectional configuration and ispreferably of uniform diameter' between the shoulder 15 andthescrew-threaded pin 13. A plurality of longitudinally spaced annulargrooves 16 are provided `in the exterior of the body 10. Thegrooves 16are preferably equally` spaced 'apart and are rounded as 'illustrated inthe drawing.' The shank ory body 10 isprovided with a` centrallongitudinal duid lpassage 17 extending completely through it from oneend to the other.'

The cutters 11 are annlarand` are mounted around the shank 10 so .thatytheir peripheries are effective in engaging the Vforma-A tion. s Theremay befany desiredfnumbe'r of Y. cutters y11 provided on the reamer andthe body 10 may be vproportioned to carry as many cutters as desired.VThe cutters 11 are supported or mountedv on the 'body 10 by the means 12so thatithey are yrotatable in planes inclined relative tol thev:longitudinal aXis of the body 10. The openings -18'in the annularcutters 11 :are axial concentric open# ings and are proportioned sothatthe cutters may be readily arranged or s'lid-Vv over the bodyj10.AThe cuttersare' supported onthe body 10 by :means 12 so that theirdiametrically .opposite portions;extendI into the ad-V joining or"successive' spacedgrooves 16 as clearly illustrated in Fig. 1 ofth'edrawing: The grooves 16 are formed so that one portion orside'of acutter maybe arranged in a groove and theopposite portion of the cuttermay be .swung into'the other groove 16. lThe peripheral portions oredgesof 'the cnt-` ters 11 are formed to eifecti'vely engage Or of theinvention shown in the drawing, the peripheral portions of the cutters11 are beveled so that the cutters present effective peripheral cuttingedges.

The means 12 rotatably supports the cutters 11 on the body so that theyare rotatable in inclined planes and are', spaced longitudinally of thebody 10. The cutter mounting means 12 is such that the cutters 11 may beeasily ari-d quickly removed frein the bod-y ,10 for repair orreplacement.-

T'he means 12 includes spacers 2O arranged between vthe cutters 11. Thespacers y are slidable on the body 10 and are provided with lY}; arallelopposite ends angularly disposed relative to their axes. The angularlydisposed ends` 21 of the spacers 20l are provided to rotatably Supportthe cutters 11. When the body 10 lis provided with the radial shoulder15, an end spacer 22 is provided at the end of the cutter assemblyandhas an end 23 normal toits central axis to abut against the shoulder15.` The .other end of the spacer 22 is angularly disposed to rotatablycarry a cuttervll- A similar end spacer 25 may be provided attheoppsiteendof the cutter assembly. The inclined ends ofthe spacers2'0, 22, and 25 are flat to effectively rotatably support the flatsides'of the cutters 11; `The spacers of the cutters l1 are proportioned andrelated so; that the diarn'fetrically opposite portion 26 of thetcttersproject considerable distances from the spacers to engage the formationand to4 positively cause rotation of the cutters.

The spacers 20, 22, and 25 are provided at their cutter supporting' endswith bea-.ring parts 27 to extend into the openings 18 of the cuttersfor supporting the cutters radially'l The bearing parts 27 projectaxially from the angular ends of the spacers and extend into theopenings 18 of the cutters. The outer walls'of the bearing parts 27 arecurved con,- centric to the axes of rotation .of the 'cutters toeffectively support the cutters for 'rota-tion. As the axes of rotationof the cutters 11 are tilted relative to the axis of the body 10;, theaxes 'of the bearing partsV 27 are 4tilted, relative 'tothe central axesof the spacers.` Due .130v their inclined axes of curvature, the bearingparts 27 terminate adjacent one edge 'of each spacer Yand have inclinedvouter walls at the Y'Opposite edge of the spacer for supporting thecutter.

The bearing parts 27 are opifiositely varr'ange'd'or disposed at the-opposite 'endsxo'i the intermediate spacers 2O so that the parts 27 oftwoLadj-acent, spacers abut to Vprovide substantially annularradialjbear-ing for the cfutters 11. y At the point where the cutters 11"extend into ,the grooves 16 one of the spacers has a Aplain latportion, While the opposingspacer has a 'bearinglpa-rt 27 'eX-,t'eiiding into the opening 18 of the cutter. The bearing parts 27 ofthe spacers abut to properly space the spacers and prevent binding ofthe cutters 11 during operation. During operation of the reamer thelongitudinal thrusts on the cutters 11 are'talren by the angularlydisposed ends of the several spacers and the radial thrusts are .takenby the bearing parts 27. l f 'n In accordance with the invention meansis provided for preventing rotation of the spacers 20, 22,.,and 25 onthe body 10. Keys 30' fit into lolfigitudinal l'eyways v31 in thebodyl). and the several spacers to prevent rotation of the spacers.l/Vith thel assembly of cutters and spacers just described it will beobvious thatv theseveral cutters 11 may be supported on the body torotate in spaced parallel angularly disposed planes as illustrated inthe drawing or that they may be supported on the body bythe spacers 171sov that they are rotatable in planes tilted in dii- 'erent directions.JIn accordance `with the preferred form of the invention the lreyways 31for 'receiving the `keys 30 are provided at dametrically opposite pointson the body 10, and in the openings of the spacersso that the spacers 11may be ,arranged in different rotative positions. The grooves 16 areannular or extend completely-around the body and are spaced so that thecutters 11 may be arranged to rotate in planes tiltedin differentdirections by properly arranging the various spacers 20, 22, and-255 Y I'lheinvention provides means for detachablyfholding the assembly ofcutters 11 andthe spacers on the-body 10. The shoulder 15 preventslongitudinal movement of the assemblyrofcutters and spacers in onedirection on the body 10', and any suitable means may be provided on thebody for preventing movement of' the assembly in the oppositedirectlon.4 In. the drawing l have illustrated a means for retainingthecutter assembly on sans the body thatislset forth and claimedin myc'o-pendingt application entitled Reamer, led Aug. "25, v14930, SerialNumber 477,628.' In the drawing I have shown an improved means fordetvachably retaining the cutter assembly 'on 'the body'. The cutterassembly retaining meansI includes a main retaining sleeve 31v"sllfi'd'able on the body'l'O 'and i'io'rnilally` held in the'retainingpositieri by a split ring 32. Ti'e 'sleeve '31 'normally heldin 'position against the sleeve a' split ring arr'aiig'ejd 'against the'end o11 thesp'acer's An outer sl'e'eve 321 is'slid'a' 'l'e on the' mainsleeve 31 and is l'o'cl'e'd 'i'n position where it extends 'over ringsuitable 'spring'locking means 35 arranged grooves in the sl'ee've 1t isbelieved tlratthe utility of the reamer provided by the.presentinv'e'ii'tion willbe ij'ea'di'l'yy apparent from thefor'ego'ingdetailed description. t 'it to'b'e no'te'dth'at the inventionvTpr'o'v'idx'e's a r'e'a'n'ier `"th'z'tt 'is 'particularly simple vandvi'ne'xpei'isi-ve o'fp-cons'tri'lction. The bea-rings o'r spacers 20,22., and 25 4and the cutters-11 are 'of simple construction and areeasily and V(prickly removed from the body 10'. The spacers effectivelysupport the cutters 11 for rotation in inclined planes. By rotating inplanes inclined relative to thelongitudinal axis of they tool, thecutters l1 are particularly effective in engaging the formation as theportions 26 project considerable distances from the central axisofthetool. The cutters ll are positively caused to rotate during operationof the reamer so that theV wear is evenly distributed along theirperipheral edges. rIhe cutters 'll cannot track in the formation duringoperation of the reamer and are particularly effective in forming asmooth round bore.

IIaving described only a typical preferred form of myY invention, I donot wish to limit myself to the specific details set forth, but wish toreserve to myself any changes or variations that may appear to thoseskilledl in the art or fall within the scope of the following claims:

Having described my invention, I claim:

l. A well tool of the character described including, a body, annularcutters surrounding the body rotatable in planes tilted relative to thelongitudinal axis of the body and having peripheral cutting parts, andspacers between the cutters rotatably supporting the cutters.

2. A well tool of the character described including, a body, annularcutters surrounding the body rotatable in planes tilted relative to thelongitudinal axis of the body and having peripheral cutting parts,spacers between the cutters, and bearing parts on the spacers extendinginto the cutters.

3. A well tool of the character described including, a body, annularcutters surrounding the body rotatable in planes tilted relative to thelongitudinal axis of the body and having cutting parts, spacers betweenthe cutters having ends inclined relative to their axes, and bearingparts on the ends forming radial supports for the cutters, theV bearingY into the cutters. l

ters surrounding the body and angularly positionedA so that they havediametrically opposite portions extending into successive grooves, andmeans for supporting the cutters to rotate about planes tilted relativeto the axis of the body.

7. A well tool of the character described including, a body havinglongitudinally spaced angular grooves, a plurality of annular cutterssurroundingthebody and angularly positioned so that they havediametrically opposite portions extending into successive grooves, andmeans for supporting the cutters to rotate ijbut planes tilted relativeto the axis of the 8.y A well tool of the character described including,a body having longitudinally spaced grooves, a plurality of annularcutters surrounding the body and angularly positioned so that they havediametrically opposite portions extending intov successive grooves, andmeans for supporting the cutters to rotate about planes tilted relativeto the axis of the body, including spacers between the cutters havingLbearing parts at their ends.

9. Awell tool of the character described including, a body havinglongitudinally spaced grooves, a plurality of annular cutterssurrounding the body and angularly posivtioned so that they havediametrically opposite portions extending into successive grooves, andmeans for supporting the cutters to rotate about planes tilted relativeto the axis of the body, including spacers between the cutters, andaxially projecting bearing parts at'the ends ,of lthe spacers extendingIn witness that I claim the foregoing I havev krhereunto subscribed myname this l1 day of July, 1930.

, VAN J. KUBIN.

parts of adjoining spacers being in abutment. n

ll. A well tool of the character described including, a body, cuttershaving openings passing the body, spacers on the body between thecutters having ends inclined relative to their axes and rotatablysupporting the cutters, and a. single key holding the spacers againstrotation on the body- 5. A well tool including, a body, annular cutterssurrounding the body. and rotatable in planes tilted relative to theaxis of the body, spacers between the cutters, bearingv arts on the endsofthe spacers extending into the cutters to rotatablysupport thecutters, and a common means for holding the several spacers againstrotation. n

6. A well tool of the character -described including, a body havinglongitudinally spaced grooves, a plurality of annular lcut-

